Write a program in matlab that solve a quadratic equation?

Answer 1

array=input('Specify the coefficients of the quadratic as a row array "[a,b,c]":');

a=array(1);

b=array(2);

c=array(3);

if (a==0) && (b==0)

fprintf('The equation is degenerate');

end

if (a==0) && (b~=0)

fprintf('There is a single root at %g.\n', -c/b);

end

if (a~=0) && (c==0)

fprintf('There are two real roots at 0 and %g.\n', -b/a);

end

if (a~=0) && (c~=0)

root1=((-b+sqrt(b*b-4*a*c))/(2*a));

root2=((-b-sqrt(b*b-4*a*c))/(2*a));

if isreal(root1)

fprintf('There are two real roots at %g and %g.\n.', root1, root2);

else

fprintf('The roots are complex:\n');

fprintf(' ');

disp(root1);

fprintf(' and ');

disp(root2);

end

end

Answer 2

You can solve a quadratic equation in MATLAB using the quadratic formula. Here is an example code snippet:

a = 1; b = 5; c = 6;

delta = b^2 - 4ac;

if delta > 0 x1 = (-b + sqrt(delta))/(2a); x2 = (-b - sqrt(delta))/(2a); disp(['The solutions are: x1 = ', num2str(x1), ', x2 = ', num2str(x2)]); elseif delta == 0 x = -b/(2*a); disp(['The solution is: x = ', num2str(x)]); else disp('No real solutions'); end